well i'm a man not a woman i'm not going to carry my cosmetics around.
i'm a normal person not a geek who will carry 4 hard disks and loads of accessories around.
One doesn't have to be a woman to need things in a bag. Needs vary, of course, but one finds in a tropical urban environment one needs to have: business card holder, sun shades, eye drops, keychain holder, wallet (only geeks put theirs in their pant pockets), a notes diary with a leather bound case or maybe just an iPad if that's your thing, cables for computers, projector in the office, USB charger, a file or two with slide printouts sometimes, maybe a small sun tan lotion, certainly a small hand cream, and so on.
Small things add up. Or make the bag slovenly anyway.
Not sure how high is "high end" for you, but Dunhill, Zegna, etc, or the much lower-end Boss (overpriced) or Kenneth Cole, all have office bags that will carry an 11 inch MBA and all the other paraphernalia mentioned above without leaving too much room for much else. Get yourself a padded cover for MBA and the in-bag space will reduce further.
That ought to do it..
PS: Just because your computer is sleek, doesn't mean you show up to an office with a 10 inch briefcase. That just looks odd. Get used to carrying a grown-up office bag. If the computers and other gadgets inside it become smaller over the years, so be it. But you're not going to be carrying a man-purse just because technology shrank.
